Answer:
Kingston Company
Jan 1 2018 Inventory $265,000
A.
Dec 31 2018 Inventory $336,600 1.02
this reflects a 2% Cost Index over base Period:
Inventory costs therefore is $336,600 divided by 102% = $330,000
B.
Dec 31 2019 427,350 1.11
this reflects a 11% Cost Index over base Period:
Inventory costs therefore is $427,350 divided by 111% = $385,000
C.
Dec 31 2020 405,000 1.08
this reflects a 8% Cost Index over base Period:
Inventory costs therefore is $405,000 divided by 108% = $375,000
Dec 31 2021 395,200 1.04
this reflects a 4% Cost Index over base Period:
Inventory costs therefore is $395,200 divided by 104% = $380,000